Style de citation APA (7e éd.)

Keith-Lucas, A. (1972). Giving and taking help. University of North Carolina.

Style de citation Chicago (17e éd.)

Keith-Lucas, Alan. Giving and Taking Help. Chapel hill: University of North Carolina, 1972.

Style de citation MLA (9e éd.)

Keith-Lucas, Alan. Giving and Taking Help. University of North Carolina, 1972.