APA

Popple P. R., Leighninger L., . (2004). The policy-based profession: an introduction to social welfare policy analysis for social workers. Boston: Allyn and Bacon.

Chicago

Popple Philip R, Leighninger Leslie, . 2004. The policy-based profession: an introduction to social welfare policy analysis for social workers. Boston: Allyn and Bacon.

Harvard

Popple P. R., Leighninger L., . (2004). The policy-based profession: an introduction to social welfare policy analysis for social workers. Boston: Allyn and Bacon.

MLA

Popple Philip R, Leighninger Leslie, . The policy-based profession: an introduction to social welfare policy analysis for social workers. Boston: Allyn and Bacon. 2004.