APA
International Congress of Acarology, . (1969). Proceedings of the 2nd International Congress of Acarology. Budapest: Akadémiai Kiabó.
Chicago
International Congress of Acarology, . 1969. Proceedings of the 2nd International Congress of Acarology. Budapest: Akadémiai Kiabó.
Harvard
International Congress of Acarology, . (1969). Proceedings of the 2nd International Congress of Acarology. Budapest: Akadémiai Kiabó.
MLA
International Congress of Acarology, . Proceedings of the 2nd International Congress of Acarology. Budapest: Akadémiai Kiabó. 1969.