Cita APA (7a ed.)

Walker, C. (1975). Environmental pollution by chemicals (2nd ed. rev.). Hutchinson.

Cita Chicago Style (17a ed.)

Walker, Colin. Environmental Pollution by Chemicals. 2nd ed. rev. London: Hutchinson, 1975.

Cita MLA (9a ed.)

Walker, Colin. Environmental Pollution by Chemicals. 2nd ed. rev. Hutchinson, 1975.