Gaya APA
Luthfi, A, N., Eja, T.
(2007).
Manusia Ulang-Alik : Biografi Umar Kayam
.
Jogjakarta:
Eja Publisher.
Gaya MLA
Luthfi, Ahmad, Nashih., Eja, Tim.
"Manusia Ulang-Alik : Biografi Umar Kayam".
Jogjakarta:
Eja Publisher,
2007.
Book.