APA (7th ed.) Zitazioa

Hansen, C. S. (1987). More group retreats. Thom Schultz.

Chicago Style (17th ed.) Zitazioa

Hansen, Cindy S. More Group Retreats. Loveland: Thom Schultz, 1987.

MLA (9th ed.) Zitazioa

Hansen, Cindy S. More Group Retreats. Thom Schultz, 1987.