Cita APA (7a ed.)

Callahan, D. (1970). Abortion: Law, choice and morality. Collier - Macmillan.

Cita Chicago Style (17a ed.)

Callahan, Daniel. Abortion: Law, Choice and Morality. London: Collier - Macmillan, 1970.

Cita MLA (9a ed.)

Callahan, Daniel. Abortion: Law, Choice and Morality. Collier - Macmillan, 1970.