Gaya APA
Davids, G, C, 1, R, C, A, F, R, (, A. (2016).
ELEMENTS OF GENERAL PHILOSOPHY .
:
Wentworth Press.
Gaya MLA
Davids, George, Croom, 1842-1892, Robertson;, Caroline, A., F., Rhys, (Caroline, Au.
"ELEMENTS OF GENERAL PHILOSOPHY".
:
Wentworth Press,
2016.
Text.