APA ציטוט

Clarkson, E. N. K. (1986). Invertebrate palaeontology and evolution (2.).

Chicago Edition Citation

Clarkson, E N K. Invertebrate Palaeontology and Evolution. 2. English Language Book Society, 1986.

ציטוט MLA

Clarkson, E N K. Invertebrate Palaeontology and Evolution. 2. 1986.