APA (7th ed.) Citation

Bersola, G. A. (1967). Basic English for vocational training. Pedro B. Ayuda.

Chicago Style (17th ed.) Citation

Bersola, Gertudes A. Basic English for Vocational Training. Manila: Pedro B. Ayuda, 1967.

MLA (9th ed.) Citation

Bersola, Gertudes A. Basic English for Vocational Training. Pedro B. Ayuda, 1967.