APA (7th ed.) Citation

United States. Bureau of Mines & ProQuest (Firm). (1969). Minerals Yearbook 1968. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines and ProQuest (Firm). Minerals Yearbook 1968. Washington: [publisher not identified], 1969.

MLA (9th ed.) Citation

United States. Bureau of Mines and ProQuest (Firm). Minerals Yearbook 1968. [publisher not identified], 1969.

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