Gaya APA

SNYDER, J, P. (1982). MAP PROJECTIONS USED BY THE U.S GEOLOGICAL SURVEY (SECOND EDITION). Washington, DC: U.S DEPARTMENT OF INTERIOR.

Gaya MLA

SNYDER, JOHN, P.. "MAP PROJECTIONS USED BY THE U.S GEOLOGICAL SURVEY". SECOND EDITION Washington, DC: U.S DEPARTMENT OF INTERIOR, 1982. Textbook.