APA (7th ed.) Citation

O'Callaghan, P. W. (1993). Energy management. McGraw-Hill.

Chicago Style (17th ed.) Citation

O'Callaghan, Paul W. Energy Management. London u.a: McGraw-Hill, 1993.

MLA (9th ed.) Citation

O'Callaghan, Paul W. Energy Management. McGraw-Hill, 1993.