Gaya APA
Happold, F, (, , , , ). (-1971).
Prayer and meditation, their nature and practice. .
(Harmondsworth):
Penguin.
Gaya MLA
Happold, F.C., (1893-, , , , ).
"Prayer and meditation, their nature and practice. ".
(Harmondsworth):
Penguin,
-1971.
Buku.