APA

Lumpkin J. R., Caballero M. J. & Chonko L. B. (1989). Direct marketing, direct selling, and the mature consumer: a research study. New York: Quorum Books.

Chicago

Lumpkin James R, Caballero Marjorie J and Chonko Lawrence B. 1989. Direct marketing, direct selling, and the mature consumer: a research study. New York: Quorum Books.

Harvard

Lumpkin J. R., Caballero M. J. and Chonko L. B. (1989). Direct marketing, direct selling, and the mature consumer: a research study. New York: Quorum Books.

MLA

Lumpkin James R, Caballero Marjorie J and Chonko Lawrence B. Direct marketing, direct selling, and the mature consumer: a research study. New York: Quorum Books. 1989.