Cita APA (7a ed.)

Zimpfer, D. G. (1988). Marriage enrichment programs: A review. [s.n.].

Cita Chicago Style (17a ed.)

Zimpfer, David G. Marriage Enrichment Programs: A Review. [S.l.]: [s.n.], 1988.

Cita MLA (9a ed.)

Zimpfer, David G. Marriage Enrichment Programs: A Review. [s.n.], 1988.