Dyfyniad APA

Ståhl, B. (1990). Taxonomic studies in the Theophrastaceae. Dept. of Systematic Botany, University of Göteborg.

Dyfyniad Arddull Chicago

Ståhl, Bertil. Taxonomic Studies in the Theophrastaceae. Göteborg, Sweden: Dept. of Systematic Botany, University of Göteborg, 1990.

Dyfyniad MLA

Ståhl, Bertil. Taxonomic Studies in the Theophrastaceae. Dept. of Systematic Botany, University of Göteborg, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.