Gaya APA
Spencer., W, H, .. (1983).
Binocular vision and ocular motility (sec. 6).
California:
American Academy of Ophtalmology.
Gaya MLA
Spencer., William, H, ..
"Binocular vision and ocular motility".
sec. 6
California:
American Academy of Ophtalmology,
1983.
Buku.