Gaya APA

ALL, E., SEVERNS, W, H. (1959). STEAM, AIR, AND GAS POWER . : JOHN WILEY & SONS, New York.

Gaya MLA

ALL, ET.., SEVERNS, WILLIAM, H.. "STEAM, AIR, AND GAS POWER". : JOHN WILEY & SONS, New York, 1959. Textbook.