Farrell, M. A., & Farmer, W. A. (1980). Systematic instruction in mathematics for the middle and high school years. Addison-Wesley Publishing Company.
Chicago Style (17th ed.) CitationFarrell, Margaret A., and Walter A. Farmer. Systematic Instruction in Mathematics for the Middle and High School Years. Reading [etc.]: Addison-Wesley Publishing Company, 1980.
MLA (9th ed.) CitationFarrell, Margaret A., and Walter A. Farmer. Systematic Instruction in Mathematics for the Middle and High School Years. Addison-Wesley Publishing Company, 1980.
Warning: These citations may not always be 100% accurate.