APA Style
Hopkins, R.F., Ditmars,R.L. (1951).
Snakes of the World .
New York:
The Macmillan Company.
Chicago Style
Hopkins, R.F., Ditmars,R.L.
Snakes of the World.
New York:
The Macmillan Company,
1951.
.
MLA Style
Hopkins, R.F., Ditmars,R.L.
Snakes of the World.
New York:
The Macmillan Company,
1951.
.
Turabian Style
Hopkins, R.F., Ditmars,R.L.
Snakes of the World.
New York:
The Macmillan Company,
1951.
.