Soberon, P. (2013). Problem-solving methods in combinatorics: An approach to olympiad problems. Birkhauser.
Chicago-стиль цитированияSoberon, Pablo. Problem-solving Methods in Combinatorics: An Approach to Olympiad Problems. London: Birkhauser, 2013.
MLA-цитированиеSoberon, Pablo. Problem-solving Methods in Combinatorics: An Approach to Olympiad Problems. Birkhauser, 2013.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.