Allen, J. R., & Walker, J. H. 1. (1922). Heating and ventilation (2nd ed.). London: McGraw-Hill Book Company.
Παραπομπή Chicago StyleAllen, John R., and J. H. 1890- Walker. Heating and Ventilation. 2nd ed. London: McGraw-Hill Book Company, 1922.
Παραπομπή MLAAllen, John R., and J. H. 1890- Walker. Heating and Ventilation. 2nd ed. London: McGraw-Hill Book Company, 1922.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.