Não informado. (2007). Report of the Penrose Research Laboratory. Zoological Society of Philadelphia.
Citace podle Chicago (17th ed.)Não informado. Report of the Penrose Research Laboratory. Philadelphia, Pa: Zoological Society of Philadelphia, 2007.
Citace podle MLA (8th ed.)Não informado. Report of the Penrose Research Laboratory. Zoological Society of Philadelphia, 2007.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..