Petikan APA

Molina, S., & Alemañy, S. (1997). Species codes for the trees of Puerto Rico and the U.S. Virgin Islands. Asheville, NC: U.S. Dept. of Agriculture, Forest Service, Southern Research Station.

Petikan Gaya Chicago

Molina, Sandra., and Salvador Alemañy. Species Codes for the Trees of Puerto Rico and the U.S. Virgin Islands. Asheville, NC: U.S. Dept. of Agriculture, Forest Service, Southern Research Station, 1997.

Petikan MLA

Molina, Sandra., and Salvador Alemañy. Species Codes for the Trees of Puerto Rico and the U.S. Virgin Islands. Asheville, NC: U.S. Dept. of Agriculture, Forest Service, Southern Research Station, 1997.