APA
James L Lawson, George E Uhlenbeck, . (1950). Threshold Signals. New York: Mcgraw Hill Book Compnany.
Chicago
James L Lawson, George E Uhlenbeck, . 1950. Threshold Signals. New York: Mcgraw Hill Book Compnany.
Harvard
James L Lawson, George E Uhlenbeck, . (1950). Threshold Signals. New York: Mcgraw Hill Book Compnany.
MLA
James L Lawson, George E Uhlenbeck, . Threshold Signals. New York: Mcgraw Hill Book Compnany. 1950.