APA (7th ed.) Citation

Laporta, E. (1989). A Practical english course: Fourth stage - 4th. Nacional IBEP.

Chicago Style (17th ed.) Citation

Laporta, Edgar. A Practical English Course: Fourth Stage - 4th. São Paulo, SP: Nacional IBEP, 1989.

MLA (9th ed.) Citation

Laporta, Edgar. A Practical English Course: Fourth Stage - 4th. Nacional IBEP, 1989.

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