APA (7th ed.) Citation

Penafiel, S. R., Veracion, V. P., & Zamora, R. D. Silvicultural researches on Benguet pine (Pinus Kesiya, Royle).

Chicago Style (17th ed.) Citation

Penafiel, S. R., V. P. Veracion, and R. D. Zamora. Silvicultural Researches on Benguet Pine (Pinus Kesiya, Royle).

MLA (9th ed.) Citation

Penafiel, S. R., et al. Silvicultural Researches on Benguet Pine (Pinus Kesiya, Royle).