APA
Hungarian Academy of Sciences, Hungarian National Committee for the IBP, . (1968). Hungarian contribution to the International Biological Programme. Budapest: s.n.
Chicago
Hungarian Academy of Sciences, Hungarian National Committee for the IBP, . 1968. Hungarian contribution to the International Biological Programme. Budapest: s.n.
Harvard
Hungarian Academy of Sciences, Hungarian National Committee for the IBP, . (1968). Hungarian contribution to the International Biological Programme. Budapest: s.n.
MLA
Hungarian Academy of Sciences, Hungarian National Committee for the IBP, . Hungarian contribution to the International Biological Programme. Budapest: s.n. 1968.