APA (7th ed.) Citation

Howe, B. (1988). Portfolio: Case studies for business English - teacher's guide. Longman.

Chicago Style (17th ed.) Citation

Howe, Brian. Portfolio: Case Studies for Business English - Teacher's Guide. England: Longman, 1988.

MLA (9th ed.) Citation

Howe, Brian. Portfolio: Case Studies for Business English - Teacher's Guide. Longman, 1988.

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