Wallis, W. D., Street, A. P., & Seberry, J. (1972). Combinatorics room squares, sum-free sets, Hadamard matrices / W.D. Wallis, Anne Penfold Street, Jennifer Seberry Wallis: Room squares, sum-free sets, Hadamard matrices. Springer-Verlag. https://doi.org/10.1007/BFb0069907
Chicago Style (17th ed.) CitationWallis, W. D., Anne Penfold Street, and Jennifer Seberry. Combinatorics Room Squares, Sum-free Sets, Hadamard Matrices / W.D. Wallis, Anne Penfold Street, Jennifer Seberry Wallis: Room Squares, Sum-free Sets, Hadamard Matrices. Berlin ; New York: Springer-Verlag, 1972. https://doi.org/10.1007/BFb0069907.
MLA (9th ed.) CitationWallis, W. D., et al. Combinatorics Room Squares, Sum-free Sets, Hadamard Matrices / W.D. Wallis, Anne Penfold Street, Jennifer Seberry Wallis: Room Squares, Sum-free Sets, Hadamard Matrices. Springer-Verlag, 1972. https://doi.org/10.1007/BFb0069907.