APA (7th ed.) Citation

So, V., de Villa, J. G., & Floresca, R. (1989). Welcome: No trespassing and more signs of the Philippines. Devcon I.P., Inc.

Chicago Style (17th ed.) Citation

So, Valentino, Jill Gale de Villa, and Raymund Floresca. Welcome: No Trespassing and More Signs of the Philippines. Makati, Metro Manila: Devcon I.P., Inc, 1989.

MLA (9th ed.) Citation

So, Valentino, et al. Welcome: No Trespassing and More Signs of the Philippines. Devcon I.P., Inc, 1989.