APA استشهاد

WALTERS, A. H. a. E. (1968). Biodeterioration of material. elsvier publishing co limited.

استشهاد بنمط شيكاغو

WALTERS, A H and ELPHICK. Biodeterioration of Material. amsterdam: elsvier publishing co limited, 1968.

MLA استشهاد

WALTERS, A H and ELPHICK. Biodeterioration of Material. elsvier publishing co limited, 1968.