APA Style
Kliegman, R, M. et al
(2020).
Nelson Textbook of Pediatrics - volume 1
(
21st ed.)
.
Philadelphia:
Elsevier.
MLA Style
Kliegman, Robert, M.. et al.
"Nelson Textbook of Pediatrics - volume 1".
21st ed.
Philadelphia:
Elsevier,
2020.
Text.