Gaya APA
Spiritual Teaching. (2006).
Yogyakarta:
Pustaka Insan Madani.
Gaya Chicago
Spiritual Teaching.
2006.
Yogyakarta:
Pustaka Insan Madani,
2006.
Text.
Gaya MLA
Spiritual Teaching.
2006.
Yogyakarta:
Pustaka Insan Madani,
2006.
Text.
Gaya Turabian
Spiritual Teaching.
Yogyakarta:
Pustaka Insan Madani,
2006.
Print.