Gaya APA
Harms, R, W.
(2004).
Mayo Clinic : Guide to a Healthy Pregnancy
.
Amerika Serikat:
HarperCollins e-books.
Gaya MLA
Harms, Roger, W..
"Mayo Clinic : Guide to a Healthy Pregnancy".
Amerika Serikat:
HarperCollins e-books,
2004.
Text.