APA

Williams M., Williams M., Grinnell R. M. & Unrau Y. A. (1998). Introduction to social work research. Itasca, Ill: F.E. Peacock Publishers.

Chicago

Williams Margaret, Williams Margaret, Grinnell Richard M and Unrau Yvonne A. 1998. Introduction to social work research. Itasca, Ill: F.E. Peacock Publishers.

Harvard

Williams M., Williams M., Grinnell R. M. and Unrau Y. A. (1998). Introduction to social work research. Itasca, Ill: F.E. Peacock Publishers.

MLA

Williams Margaret, Williams Margaret, Grinnell Richard M and Unrau Yvonne A. Introduction to social work research. Itasca, Ill: F.E. Peacock Publishers. 1998.