APA-referens (7:e uppl.)

Visser, M. H. C. (1963). The cranial morphology of Ichthyophis glutinosus (Linné) and Ichthyophis monochrous (Bleeker). [University of Stellenbosch].

Chicago-referens (17:e uppl.)

Visser, M. H. C. The Cranial Morphology of Ichthyophis Glutinosus (Linné) and Ichthyophis Monochrous (Bleeker). Stellenbosch: [University of Stellenbosch], 1963.

MLA-referens (8:e uppl.)

Visser, M. H. C. The Cranial Morphology of Ichthyophis Glutinosus (Linné) and Ichthyophis Monochrous (Bleeker). [University of Stellenbosch], 1963.