Gaya APA
Spherical Trigonometry. (1942).
New York:
appleton centurycroft inc.
Gaya Chicago
Spherical Trigonometry.
.
New York:
appleton centurycroft inc,
1942.
Text.
Gaya MLA
Spherical Trigonometry.
.
New York:
appleton centurycroft inc,
1942.
Text.
Gaya Turabian
Spherical Trigonometry.
New York:
appleton centurycroft inc,
1942.
Print.