Gaya APA

Davis, H, E., ì, I, T, G, E, I, H, G, F. (NULL). The testing of engineering materials . Auckland:: .

Gaya MLA

Davis, Harmer, E.., ì, I., Troxell,, George, Earl, II., Hauck,, George, F.W.. "The testing of engineering materials". Auckland:: , NULL. Text.