Delima, E. M. M. (2004). Identification and classification of pterdophtye (pterophyte) species in Brgy. Sta. Emilia, Veruela, Agusan del Sur.
Cita Chicago (17th ed.)Delima, Elsa May M. Identification and Classification of Pterdophtye (pterophyte) Species in Brgy. Sta. Emilia, Veruela, Agusan Del Sur. 2004.
Cita MLA (9th ed.)Delima, Elsa May M. Identification and Classification of Pterdophtye (pterophyte) Species in Brgy. Sta. Emilia, Veruela, Agusan Del Sur. 2004.
Atenció: Aquestes cites poden no estar 100% correctes.