Portmann, A. Animal forms and patterns: A study of the appearance of animals.
Cita Chicago (17th ed.)Portmann, Adolf. Animal Forms and Patterns: A Study of the Appearance of Animals.
Cita MLA (9th ed.)Portmann, Adolf. Animal Forms and Patterns: A Study of the Appearance of Animals.
Atenció: Aquestes cites poden no estar 100% correctes.