APA Style
BILLINGS, Evelyn. (1995).
Teaching The Billings Ovulation Method (Ed. 2).
Australia:
Ovulation Method Reserch and Referance Centre.
Chicago Style
BILLINGS, Evelyn.
Teaching The Billings Ovulation Method.
Ed. 2
Australia:
Ovulation Method Reserch and Referance Centre,
1995.
.
MLA Style
BILLINGS, Evelyn.
Teaching The Billings Ovulation Method.
Ed. 2
Australia:
Ovulation Method Reserch and Referance Centre,
1995.
.
Turabian Style
BILLINGS, Evelyn.
Teaching The Billings Ovulation Method.
Ed. 2
Australia:
Ovulation Method Reserch and Referance Centre,
1995.
.