Gaya APA

Backer, A., Brink, R, B, V, D. (1968). Flora of Java: spermatophytes only . Netherlands: Wolters-Noordhoff N.V..

Gaya MLA

Backer, A.., Brink, R.C., Bakhuizen, Van, Den. "Flora of Java: spermatophytes only". Netherlands: Wolters-Noordhoff N.V., 1968. Text.