APA Style
Spuler, B.
(1995).
The age of the caliphs oleh Bertold Spuler
.
Princenton:
Markus Wiener Publisher.
MLA Style
Spuler, Bertold.
"The age of the caliphs oleh Bertold Spuler".
Princenton:
Markus Wiener Publisher,
1995.
Text.