APA Edition Citation

Heidelberg , A. D., & Zurich B Eckmann. Combinatorics, Room Squares, Sum-free sets, Hadamard Matrices.

Chicago Edition Citation

Heidelberg , A Dold, and Zurich B Eckmann. Combinatorics, Room Squares, Sum-free Sets, Hadamard Matrices.

MLA Edition Citation

Heidelberg , A Dold, and Zurich B Eckmann. Combinatorics, Room Squares, Sum-free Sets, Hadamard Matrices.

Warning: These citations may not always be 100% accurate.