Cita APA (7a ed.)

Pedersen, T. M. (1972). Cyperus laetus Presl and Cyperus rigens Presl, two badly understood South American sedges, with notes on some related species.

Cita Chicago Style (17a ed.)

Pedersen, Troels Myndel. Cyperus Laetus Presl and Cyperus Rigens Presl, Two Badly Understood South American Sedges, with Notes on Some Related Species. 1972.

Cita MLA (8a ed.)

Pedersen, Troels Myndel. Cyperus Laetus Presl and Cyperus Rigens Presl, Two Badly Understood South American Sedges, with Notes on Some Related Species. 1972.