Cita APA

Covey,Stephen R. (1991). Principle centred leadership. Pocket Books.

Citación estilo Chicago

Covey,Stephen R. Principle Centred Leadership. London: Pocket Books, 1991.

Cita MLA

Covey,Stephen R. Principle Centred Leadership. Pocket Books, 1991.

Warning: These citations may not always be 100% accurate.