Cita APA (7a ed.)

(1988). Publishers, distributors, & wholesalers of the United States (1988-89.). Bowker.

Cita Chicago Style (17a ed.)

Publishers, Distributors, & Wholesalers of the United States. 1988-89. New York: Bowker, 1988.

Cita MLA (9a ed.)

Publishers, Distributors, & Wholesalers of the United States. 1988-89. Bowker, 1988.