APA (7th ed.) Citation

VALKOVIC, V. (1978). Trace elements in petroleum. The Petroleum Publishing Company Books.

Chicago Style (17th ed.) Citation

VALKOVIC, Vlado. Trace Elements in Petroleum. The Petroleum Publishing Company Books, 1978.

MLA (8th ed.) Citation

VALKOVIC, Vlado. Trace Elements in Petroleum. The Petroleum Publishing Company Books, 1978.

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