Childs, M. W. (1952). Yesterday today and tomorrow . The farmer takes a hand.
Cita Chicago Style (17a ed.)Childs, Marquis W. Yesterday Today and Tomorrow . The Farmer Takes a Hand. United States : McArdle Book Division, 1952.
Cita MLA (9a ed.)Childs, Marquis W. Yesterday Today and Tomorrow . The Farmer Takes a Hand. 1952.
警告：這些引文格式不一定是100％准確.