APA (7th ed.) Citation

Rigby, J. K. (1986). Sponges of the Burgess shale (Middle Cambrian), British Columbia. Canadian Soc. of Petrolium Geologists.

Chicago Style (17th ed.) Citation

Rigby, J. Keith. Sponges of the Burgess Shale (Middle Cambrian), British Columbia. Calgary, Alberta u.a: Canadian Soc. of Petrolium Geologists, 1986.

MLA (9th ed.) Citation

Rigby, J. Keith. Sponges of the Burgess Shale (Middle Cambrian), British Columbia. Canadian Soc. of Petrolium Geologists, 1986.