Παραπομπή APA

Singh, R. S. (1978). Introduction to principles of plant pathology (2.). Oxford I B H publishing company.

Παραπομπή Chicago Style

Singh, R S. Introduction to Principles of Plant Pathology. 2. New Delhi: Oxford I B H publishing company, 1978.

Παραπομπή MLA

Singh, R S. Introduction to Principles of Plant Pathology. 2. Oxford I B H publishing company, 1978.