Petersen, R. C. Connecticut's venomous snakes: Timber, rattlesnake and Northern copperhead.
Čikaški stil citiranja (17. izdanje)Petersen, Richard C. Connecticut's Venomous Snakes: Timber, Rattlesnake and Northern Copperhead. Middletown.
MLA način citiranja (9. izdanje)Petersen, Richard C. Connecticut's Venomous Snakes: Timber, Rattlesnake and Northern Copperhead.
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