APA (7th ed.) Citation

Hanan Mack, Cribbin James, & Donis Jack. (1978). Systems selling strategies. AMACOM.

Chicago Style (17th ed.) Citation

Hanan Mack, Cribbin James, and Donis Jack. Systems Selling Strategies. AMACOM, 1978.

MLA (8th ed.) Citation

Hanan Mack, et al. Systems Selling Strategies. AMACOM, 1978.