APA

Semenas L. G., Ortubay S. G. & Ubeda C. a.Studies on the development and life history of Pomphorhynchus patagonicus Ortubay, Ubeda, Semenas et Kennedy, 1991 - Palaeacanthocephala. : .

Chicago

Semenas L G, Ortubay Silvia G and Ubeda Carmen a.Studies on the development and life history of Pomphorhynchus patagonicus Ortubay, Ubeda, Semenas et Kennedy, 1991 - Palaeacanthocephala. : .

Harvard

Semenas L. G., Ortubay S. G. and Ubeda C. a.Studies on the development and life history of Pomphorhynchus patagonicus Ortubay, Ubeda, Semenas et Kennedy, 1991 - Palaeacanthocephala. : .

MLA

Semenas L G, Ortubay Silvia G and Ubeda Carmen a.: . .