APA stil citiranja

Heal, W. O. (1993). Towards terrestrial observing system [GTOS]: Towards terrestrial observing system [GTOS] : detecting and monitoring change in terrestrial ecosystems. Stockholm: The International Geosphere-Biosphere Programme.

Chicago stil citiranja

Heal, William O. Towards terrestrial observing system [GTOS]: Towards terrestrial observing system [GTOS] : detecting and monitoring change in terrestrial ecosystems. Stockholm: The International Geosphere-Biosphere Programme, 1993.

MLA stil citiranja

Heal, William O. Towards terrestrial observing system [GTOS]: Towards terrestrial observing system [GTOS] : detecting and monitoring change in terrestrial ecosystems. Stockholm: The International Geosphere-Biosphere Programme, 1993.