APA

Thumann A., . (1977). Plant engineers and managers guide to energy conservation. New York: Van Nostrand Reinhold.

Chicago

Thumann Albert, . 1977. Plant engineers and managers guide to energy conservation. New York: Van Nostrand Reinhold.

Harvard

Thumann A., . (1977). Plant engineers and managers guide to energy conservation. New York: Van Nostrand Reinhold.

MLA

Thumann Albert, . Plant engineers and managers guide to energy conservation. New York: Van Nostrand Reinhold. 1977.