APA

Dickson E. M., Ryan J. W. & Smulyan M. H. (1977). The hydrogen energy economy. New York: Praeger.

Chicago

Dickson Edward M, Ryan John W and Smulyan Marilyn H. 1977. The hydrogen energy economy. New York: Praeger.

Harvard

Dickson E. M., Ryan J. W. and Smulyan M. H. (1977). The hydrogen energy economy. New York: Praeger.

MLA

Dickson Edward M, Ryan John W and Smulyan Marilyn H. The hydrogen energy economy. New York: Praeger. 1977.