APA (7th ed.) Citation

Bell Douglas H., Morrey Ian, & Pugh John R. (1997). The Essence of program design. Pearson Education.

Chicago Style (17th ed.) Citation

Bell Douglas H., Morrey Ian, and Pugh John R. The Essence of Program Design. Pearson Education, 1997.

MLA (8th ed.) Citation

Bell Douglas H., et al. The Essence of Program Design. Pearson Education, 1997.