Smith, W. (1970). Problems in modern physics. New York: Gordon and Breach Science Publishers.
Παραπομπή Chicago StyleSmith, Willy. Problems in Modern Physics. New York: Gordon and Breach Science Publishers, 1970.
Παραπομπή MLASmith, Willy. Problems in Modern Physics. New York: Gordon and Breach Science Publishers, 1970.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.