APA (7th ed.) Citation

Kaplan, A., & DeBold, C. (2004). Math on call: A mathematics handbook. Great Source Education Group.

Chicago Style (17th ed.) Citation

Kaplan, Andrew, and Carol DeBold. Math on Call: A Mathematics Handbook. Wilmington, Mass: Great Source Education Group, 2004.

MLA (9th ed.) Citation

Kaplan, Andrew, and Carol DeBold. Math on Call: A Mathematics Handbook. Great Source Education Group, 2004.