APA (7th ed.) Citation

Cornelius, E. T. J. (1990). American English. Part 1. Book 3. Tasks 49 - 72. Úlehla.

Chicago Style (17th ed.) Citation

Cornelius, Edwin T. Jr. American English. Part 1. Book 3. Tasks 49 - 72. Praha: Úlehla, 1990.

MLA (9th ed.) Citation

Cornelius, Edwin T. Jr. American English. Part 1. Book 3. Tasks 49 - 72. Úlehla, 1990.