Here is an example of how this citation would look as a footnote:

1. John Bassett household, 1870 U.S. census, Henry County, Virginia, population schedule, Martinsville township, page 103, line 14, FHL microfilm 553155, frame 27.

Here is an example of how it would look as a bibliographic citation:

Virginia. Henry County. 1870 U.S. census, population schedule. Microfilm 553155. Family History Library, Salt Lake City, Utah.

Finally, this is an example of how an abstract of the important information in that census would look in your general notes area:

John Bassett, age 43, male, white, farmer, real estate $ 1500, personal $ 100, born VA; Nancy, 33, f, w, keeping house, b VA; Joshua, 7, w, m, at home, b VA; Mary, 5, f, w, at home, b VA; John D., 2, m, w, at home, b VA; Charles A., 1, m, w, at home, b VA.