APA (7th ed.) Citation

Sage Publications & Duck, S. (1993). Individuals in relationships. SAGE.

Chicago Style (17th ed.) Citation

Sage Publications and Steve Duck. Individuals in Relationships. Newbury Park, Calif. ; London: SAGE, 1993.

MLA (9th ed.) Citation

Sage Publications and Steve Duck. Individuals in Relationships. SAGE, 1993.