APA استشهاد

Walker, J. C. (1969). Plant pathology (3rd ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

Walker, John Charles. Plant Pathology. 3rd ed. Bombay: McGraw-Hill, 1969.

MLA استشهاد

Walker, John Charles. Plant Pathology. 3rd ed. McGraw-Hill, 1969.