APA (7th ed.) Citation

Stanley H. Kaplan Educational Center (New York, N.Y.), & Kaplan, S. H. (1990). GRE mathematics home study: Problem solving. Stanley H. Kaplan Educational Center.

Chicago Style (17th ed.) Citation

Stanley H. Kaplan Educational Center (New York, N.Y.), and Stanley H. Kaplan. GRE Mathematics Home Study: Problem Solving. [New York]: Stanley H. Kaplan Educational Center, 1990.

MLA (9th ed.) Citation

Stanley H. Kaplan Educational Center (New York, N.Y.), and Stanley H. Kaplan. GRE Mathematics Home Study: Problem Solving. Stanley H. Kaplan Educational Center, 1990.