APA (7th ed.) Citation

Ryser, H. J. (1973). Combinatorical mathematics (4. print.). Math. Assoc. of America.

Chicago Style (17th ed.) Citation

Ryser, Herbert J. Combinatorical Mathematics. 4. print. [Washington, DC]: Math. Assoc. of America, 1973.

MLA (9th ed.) Citation

Ryser, Herbert J. Combinatorical Mathematics. 4. print. Math. Assoc. of America, 1973.