APA

Coler B. S., . (1931). He made them twain: a sociologist's views on marraige and companionism. New Yor City: Educational Press.

Chicago

Coler Bird S, . 1931. He made them twain: a sociologist's views on marraige and companionism. New Yor City: Educational Press.

Harvard

Coler B. S., . (1931). He made them twain: a sociologist's views on marraige and companionism. New Yor City: Educational Press.

MLA

Coler Bird S, . He made them twain: a sociologist's views on marraige and companionism. New Yor City: Educational Press. 1931.