Cita APA (7a ed.)

Derrick, C. (1985). Too many people?: A problem in values. Ignatius Press.

Cita Chicago Style (17a ed.)

Derrick, Christopher. Too Many People?: A Problem in Values. San Francisco: Ignatius Press, 1985.

Cita MLA (9a ed.)

Derrick, Christopher. Too Many People?: A Problem in Values. Ignatius Press, 1985.