Cita APA (7a ed.)

Gurman, A. S., & Kniskern, D. P. (1977). Enriching research on marital enrichment programs. [s.n.].

Cita Chicago Style (17a ed.)

Gurman, Alan S., y David P. Kniskern. Enriching Research on Marital Enrichment Programs. [S.l.]: [s.n.], 1977.

Cita MLA (9a ed.)

Gurman, Alan S., y David P. Kniskern. Enriching Research on Marital Enrichment Programs. [s.n.], 1977.