APA (7th ed.) Citation

Zimbardo, P. G. (1989). Shyness: What it is. Addison-Wesley.

Chicago Style (17th ed.) Citation

Zimbardo, Philip G. Shyness: What It Is. Massachusetts: Addison-Wesley, 1989.

MLA (9th ed.) Citation

Zimbardo, Philip G. Shyness: What It Is. Addison-Wesley, 1989.