Gaya APA
Duke-Elder, S, S., Abrams, D. (1970).
System of Opthalmology. Vol. V. Opthalmic Optics and Refraction .
St. Louis:
The C.V. Mosby.
Gaya MLA
Duke-Elder, Sir, Stewart., Abrams, David.
"System of Opthalmology. Vol. V. Opthalmic Optics and Refraction".
St. Louis:
The C.V. Mosby,
1970.
print.