Cita APA

Villalobos, C. R. (1973). Ptychophallus costaricensis, a new freshwater crab from Costa Rica.

Chicago Style Citation

Villalobos, Carlos R. Ptychophallus Costaricensis, a New Freshwater Crab From Costa Rica. 1973.

Cita MLA

Villalobos, Carlos R. Ptychophallus Costaricensis, a New Freshwater Crab From Costa Rica. 1973.

Atenció: Aquestes cites poden no estar 100% correctes.