Berman, G., & Fryer, K. D. (1972). Introduction to Combinatorics. New York: Academic Press.
Dyfyniad Arddull ChicagoBerman, Gerald, và K. D. Fryer. Introduction to Combinatorics. New York: Academic Press, 1972.
Dyfyniad MLABerman, Gerald, và K. D. Fryer. Introduction to Combinatorics. New York: Academic Press, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.