APA (7th ed.) Citation

Keirsey, D., & Bates, M. M. (1984). Please understand me: Character & temperament types (4th ed.). Prometheas Nemesis.

Chicago Style (17th ed.) Citation

Keirsey, David, and Marilyn M. Bates. Please Understand Me: Character & Temperament Types. 4th ed. Del Mar, Calif: Prometheas Nemesis, 1984.

MLA (9th ed.) Citation

Keirsey, David, and Marilyn M. Bates. Please Understand Me: Character & Temperament Types. 4th ed. Prometheas Nemesis, 1984.