APA Edition Citation

Hardy, W. C., & Merlein, H. A. (1977). Energy economics. Gulf Publications.

Chicago Edition Citation

Hardy, W C., and H A. Merlein. Energy Economics. Texas: Gulf Publications, 1977.

MLA Edition Citation

Hardy, W C., and H A. Merlein. Energy Economics. Gulf Publications, 1977.

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