APA (7th ed.) Citation

Sage Publications, Lymbery, M., & Postle, K. (2007). Social work: A companion to learning. SAGE.

Chicago Style (17th ed.) Citation

Sage Publications, Mark Lymbery, and Karen Postle. Social Work: A Companion to Learning. Los Angeles, Calif. ; London: SAGE, 2007.

MLA (9th ed.) Citation

Sage Publications, et al. Social Work: A Companion to Learning. SAGE, 2007.