APA
N.N. Petrov, . (1958). Problems Of Oncology. New York: Pergamon Press.
Chicago
N.N. Petrov, . 1958. Problems Of Oncology. New York: Pergamon Press.
Harvard
N.N. Petrov, . (1958). Problems Of Oncology. New York: Pergamon Press.
MLA
N.N. Petrov, . Problems Of Oncology. New York: Pergamon Press. 1958.