Cita APA (7th ed.)

World Education (Organization : U.S.), Keehn, T. B., & Harman, D. (1971). Functional education for family life planning. World Education.

Cita Chicago (17th ed.)

World Education (Organization : U.S.), Thomas B. Keehn, i David Harman. Functional Education for Family Life Planning. New York: World Education, 1971.

Cita MLA (9th ed.)

World Education (Organization : U.S.), et al. Functional Education for Family Life Planning. World Education, 1971.