APA Style
Triparthi, KD, Rowe, Raymond C, Pfizer. (2003).
Viagra (sildenafil citrate) (NULL).
:
Pfizer.
Chicago Style
Triparthi, KD, Rowe, Raymond C, Pfizer.
Viagra (sildenafil citrate).
NULL
:
Pfizer,
2003.
Text.
MLA Style
Triparthi, KD, Rowe, Raymond C, Pfizer.
Viagra (sildenafil citrate).
NULL
:
Pfizer,
2003.
Text.
Turabian Style
Triparthi, KD, Rowe, Raymond C, Pfizer.
Viagra (sildenafil citrate).
NULL
:
Pfizer,
2003.
Print.