APA

Oliva R. A. . M. L. . L. R. F., .The Great International ‘‘ MATH ON KEYS ’’ BOOK. U.S.A: Texas Instruments Incorporated, 1976: .

Chicago

Oliva Ralph A M.Dean LaMont Linda R Fowler, .The Great International ‘‘ MATH ON KEYS ’’ BOOK. U.S.A: Texas Instruments Incorporated, 1976: .

Harvard

Oliva R. A. . M. L. . L. R. F., .The Great International ‘‘ MATH ON KEYS ’’ BOOK. U.S.A: Texas Instruments Incorporated, 1976: .

MLA

Oliva Ralph A M.Dean LaMont Linda R Fowler, .U.S.A: Texas Instruments Incorporated, 1976: . .