APA (7th ed.) Citation

Severin, C., Castro, T. F., & Charles, B. H. (1973). Tree finder for Manila Zoo environs: A pocket manual for identifying some Philippine trees. United Pub.].

Chicago Style (17th ed.) Citation

Severin, Charles, Terry F. Castro, and Brother H. Charles. Tree Finder for Manila Zoo Environs: A Pocket Manual for Identifying Some Philippine Trees. [Manila: United Pub.], 1973.

MLA (9th ed.) Citation

Severin, Charles, et al. Tree Finder for Manila Zoo Environs: A Pocket Manual for Identifying Some Philippine Trees. United Pub.], 1973.