APA

Schwartz L., Tulipan L. & USA. (19). Skin hazards in American industry. Washington: U.S. G.P.O.

Chicago

Schwartz Louis, Tulipan Louis and USA. 19. Skin hazards in American industry. Washington: U.S. G.P.O.

Harvard

Schwartz L., Tulipan L. and USA. (19). Skin hazards in American industry. Washington: U.S. G.P.O.

MLA

Schwartz Louis, Tulipan Louis and USA. Skin hazards in American industry. Washington: U.S. G.P.O. 19.