Cita APA (7th ed.)

Postlethwait, J. H., & Hopson, J. L. (1992). The nature of life (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Postlethwait, John H., i Janet L. Hopson. The Nature of Life. 2nd ed. New York: McGraw-Hill, 1992.

Cita MLA (8th ed.)

Postlethwait, John H., i Janet L. Hopson. The Nature of Life. 2nd ed. McGraw-Hill, 1992.