APA (7th ed.) Citation

Heller, R. (1966). New trends in Biology teaching. UNESCO.

Chicago Style (17th ed.) Citation

Heller, René. New Trends in Biology Teaching. París: UNESCO, 1966.

MLA (9th ed.) Citation

Heller, René. New Trends in Biology Teaching. UNESCO, 1966.

Warning: These citations may not always be 100% accurate.