APA (7th ed.) Citation

Ochyra, R., & Lewis-Smith, R. I. (1998). Antarctic species in the genus Ditrichum (Ditrichaceae, Bryopsida), with a description of D. gemmiferum sp. nov. Helsinki : Societas biologica Fennica Vanamo.

Chicago Style (17th ed.) Citation

Ochyra, Ryszard, and Ronald I. Lewis-Smith. Antarctic Species in the Genus Ditrichum (Ditrichaceae, Bryopsida), with a Description of D. Gemmiferum Sp. Nov. Helsinki : Societas biologica Fennica Vanamo, 1998.

MLA (9th ed.) Citation

Ochyra, Ryszard, and Ronald I. Lewis-Smith. Antarctic Species in the Genus Ditrichum (Ditrichaceae, Bryopsida), with a Description of D. Gemmiferum Sp. Nov. Helsinki : Societas biologica Fennica Vanamo, 1998.