School Mathamatics Project. (1991). SMP 11- 16: Teachers guide Book6 (Fourth Printing.). University of Cambridge 1.
Chicago Style (17th ed.) CitationSchool Mathamatics Project. SMP 11- 16: Teachers Guide Book6. Fourth Printing. USA: University of Cambridge 1, 1991.
MLA (9th ed.) CitationSchool Mathamatics Project. SMP 11- 16: Teachers Guide Book6. Fourth Printing. University of Cambridge 1, 1991.
Warning: These citations may not always be 100% accurate.