توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Leyva, J. F. (1940). Biochemical studies on tuberculosis. I. The purified protein derivative of tuberculin: Its isolation by a simpler method and its probable chemica identity. s.n.].

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Leyva, Jose F. Biochemical Studies on Tuberculosis. I. The Purified Protein Derivative of Tuberculin: Its Isolation by a Simpler Method and Its Probable Chemica Identity. [S.l: s.n.], 1940.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Leyva, Jose F. Biochemical Studies on Tuberculosis. I. The Purified Protein Derivative of Tuberculin: Its Isolation by a Simpler Method and Its Probable Chemica Identity. s.n.], 1940.