APA

Schatz H., Schatz I., . (1989). Arachnological research in the Galapagos Islands (Ecuador) with special reference to the Oribatida (Acari). : .

Chicago

Schatz Heinrich, Schatz Irene, . 1989. Arachnological research in the Galapagos Islands (Ecuador) with special reference to the Oribatida (Acari). : .

Harvard

Schatz H., Schatz I., . (1989). Arachnological research in the Galapagos Islands (Ecuador) with special reference to the Oribatida (Acari). : .

MLA

Schatz Heinrich, Schatz Irene, . Arachnological research in the Galapagos Islands (Ecuador) with special reference to the Oribatida (Acari). : . 1989.