APA (7th ed.) Citation

Parker, R. L., & Fleischer, M. (1968). Geochemistry of niobium and tantalum. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Parker, Raymond L., and Michael Fleischer. Geochemistry of Niobium and Tantalum. Washington: U.S. Govt. Print. Off, 1968.

MLA (9th ed.) Citation

Parker, Raymond L., and Michael Fleischer. Geochemistry of Niobium and Tantalum. U.S. Govt. Print. Off, 1968.