Gaya APA
E., N, &, O, R. (1977).
On the psychology of meditation. .
Harmondsworth:
Harmondsworth Penguin Books.
Gaya MLA
E., Naranjo,Claudio, &, Ornstein,, Robert.
"On the psychology of meditation. ".
Harmondsworth:
Harmondsworth Penguin Books,
1977.
Buku.