We often preserve those cryptic citations to unidentifiable sources until we have found identifiable good-quality sources to support the information that is attributed to the source(s). (Better to show that the information came from an unfindable file named something like "Bob.ged" than to delete the citation and leave no clue on the source.) Until we have a good source, the information in the cryptic citation does give the reader an indication of the quality of the information, and sometimes the cryptic citation may help us figure out what the original contributor was thinking.
So, as others have said, the most important thing is to find solid sources. On that subject, the Sprague work (a well-regarded secondary source) that's cited in the profile says of Mary (in excerpts from more extensive notes):
 Children of Joseph & Abigail born at Braintree:
ix. Mary, Feb. 25, 1667/8; m. Samuel Bass as 3rd wife.
 Dea. SAMUEL3 BASS, (John2, Samuel1), born Mar. 25 1660; died Feb. 20 1751 in 91st year, (GS) East Bridgewater....
Married 3rd, about 1693, Mary Adams, born Feb. 25 1667/8; died Mar. 9 1706, dau. of Joseph & Abigail (Baxter) Adams. She was not the Mary Adams who had married Samuel Webb as stated in many books....
Samuel & Mary Bass were admitted to full communion at Braintree Sept. 12 1697.
 Children of Samuel & Mary born at Braintree:
+ i. Jonathan, bapt. Oct. 3 1697.
ii. Abigail, bapt. Oct. 3 1697; m. about 1715, John Wild Jr.
iii. Mary, bapt. Aug. 14 1698; m. Apr. 2 1720, William Bowditch.
+ iv. Samuel, July 26 1700, bapt. June30 1700 (sic).
v. Bethiah, Feb. 2 1704; m. Dec. 7 1727 at Boston, William Torrey.
I note that Sprague expressly states that she didn't marry Samuel Webb.