APA (7th ed.) Citation

Gardner, S., & Gardner, S. (2011). Heritage trees of Penang. Areca Books.

Chicago Style (17th ed.) Citation

Gardner, Simon, and Simon;Lai Gardner. Heritage Trees of Penang. Areca Books, 2011.

MLA (9th ed.) Citation

Gardner, Simon, and Simon;Lai Gardner. Heritage Trees of Penang. Areca Books, 2011.

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