Citazione Stile APA (7a Edizione)

Hays, J. W. (1913). How to cut your coal bill. A.W. Shaw Company.

Citazione stile Chigago Style (17a edizione)

Hays, Joseph W. How to Cut Your Coal Bill. London: A.W. Shaw Company, 1913.

Citatione MLA (9a ed.)

Hays, Joseph W. How to Cut Your Coal Bill. A.W. Shaw Company, 1913.