APA Citation

Frenkel, R. E. (1970). Treading vegetation on Costa Rican soccer field. Oregon: State University.

Chicago Style Citation

Frenkel, Robert E. Treading Vegetation On Costa Rican Soccer Field. Oregon: State University, 1970.

MLA Citation

Frenkel, Robert E. Treading Vegetation On Costa Rican Soccer Field. Oregon: State University, 1970.

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