APA (7th ed.) Citation

Sheahan, R. T. (1981). Alternative energy sources: A strategy planning guide. Aspen Systems Corp.

Chicago Style (17th ed.) Citation

Sheahan, Richard T. Alternative Energy Sources: A Strategy Planning Guide. Rockville, Ma: Aspen Systems Corp, 1981.

MLA (9th ed.) Citation

Sheahan, Richard T. Alternative Energy Sources: A Strategy Planning Guide. Aspen Systems Corp, 1981.