APA (7th ed.) Citation

Sheldrick, W. F., & Stier, H. (1978). World potash survey / William F. Sheldrick, Harald Stier. IBRD.

Chicago Style (17th ed.) Citation

Sheldrick, William F., and Harold Stier. World Potash Survey / William F. Sheldrick, Harald Stier. Washington, D. C.: IBRD, 1978.

MLA (9th ed.) Citation

Sheldrick, William F., and Harold Stier. World Potash Survey / William F. Sheldrick, Harald Stier. IBRD, 1978.

Warning: These citations may not always be 100% accurate.