APA Style

Lussier, R, N., Achua, C, F. (2016). Leadership : theory, application and skill development. Sixth Edition (Sixth Edition). Boston: Cengage Learning.

MLA Style

Lussier, Robert, N., Achua, Christopher, F. "Leadership : theory, application and skill development. Sixth Edition". Sixth Edition Boston: Cengage Learning, 2016. Text.