Gaya APA

Interior, U, D, O, T., HORTON, R, C. (1985). Mineral facts and problems (1985 Edition). Washington: U.S. Government Printing Office.

Gaya MLA

Interior, US, Dept., Of, The., HORTON, Robert, C.. "Mineral facts and problems". 1985 Edition Washington: U.S. Government Printing Office, 1985. Text.