APA Style
PORTER , Robert S.. (2018).
The Merck Manual of Diagnosis and Therapy (Ed. 20).
USA:
Merck Sharp & Dohme Research Laboratories.
Chicago Style
PORTER , Robert S..
The Merck Manual of Diagnosis and Therapy.
Ed. 20
USA:
Merck Sharp & Dohme Research Laboratories,
2018.
Text.
MLA Style
PORTER , Robert S..
The Merck Manual of Diagnosis and Therapy.
Ed. 20
USA:
Merck Sharp & Dohme Research Laboratories,
2018.
Text.
Turabian Style
PORTER , Robert S..
The Merck Manual of Diagnosis and Therapy.
Ed. 20
USA:
Merck Sharp & Dohme Research Laboratories,
2018.
Print.