APA
Nichols M. P., Nichols M. P., . (1998). Family therapy. Boston: Allyn and Bacon.
Chicago
Nichols Michael P, Nichols Michael P, . 1998. Family therapy. Boston: Allyn and Bacon.
Harvard
Nichols M. P., Nichols M. P., . (1998). Family therapy. Boston: Allyn and Bacon.
MLA
Nichols Michael P, Nichols Michael P, . Family therapy. Boston: Allyn and Bacon. 1998.