APA (7th ed.) Citation

Witherspoon, P. A., & Nagashima, K. (1957). Use of trace metals to identify Illinois crude oils. [publisher not identified].

Chicago Style (17th ed.) Citation

Witherspoon, Paul Adams, and Kozo Nagashima. Use of Trace Metals to Identify Illinois Crude Oils. Urbana: [publisher not identified], 1957.

MLA (9th ed.) Citation

Witherspoon, Paul Adams, and Kozo Nagashima. Use of Trace Metals to Identify Illinois Crude Oils. [publisher not identified], 1957.

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