American Psychological Association
Barnis, Bernard Prakash ( 1998 ). God`s Gift of Nature: A Psycho-Biological Study of Natural Family Planning ( 00 ed. ). St Peter`s Pontifical Institute.
Modern Language Association
Barnis, Bernard Prakash. God`s Gift of Nature: A Psycho-Biological Study of Natural Family Planning . St Peter`s Pontifical Institute. 1998
Chicago Citation
Barnis, Bernard Prakash. God`s Gift of Nature: A Psycho-Biological Study of Natural Family Planning . 00 .Bengaluru
: St Peter`s Pontifical Institute, 1998.
American Medical Association
Barnis, Bernard Prakash. God`s Gift of Nature: A Psycho-Biological Study of Natural Family Planning . St Peter`s Pontifical Institute; 1998.