APA ציטוט

(1990). Nelson essentials of pediatrics. Philadelphia: S. W. Saunder Co.

Trích dẫn kiểu Chicago

Nelson Essentials of Pediatrics. Philadelphia: S. W. Saunder Co, 1990.

ציטוט MLA

Nelson Essentials of Pediatrics. Philadelphia: S. W. Saunder Co, 1990.