APA-referens (7:e uppl.)

Palmer, R. G., & Troeh, F. R. (1977). Introductory soil science laboratory manual (2nd ed.). Iowa State University Press.

Chicago-referens (17:e uppl.)

Palmer, Robert G., och Frederick R. Troeh. Introductory Soil Science Laboratory Manual. 2nd ed. Ames: Iowa State University Press, 1977.

MLA-referens (9:e uppl.)

Palmer, Robert G., och Frederick R. Troeh. Introductory Soil Science Laboratory Manual. 2nd ed. Iowa State University Press, 1977.