Cita APA (7a ed.)

Häfliger, E., & Scholz, H. (1980). Grass weeds: 1, Weeds of the subfamily Panicoideae. Ciba-Geigy.

Cita Chicago Style (17a ed.)

Häfliger, Ernst, y Hildemar Scholz. Grass Weeds: 1, Weeds of the Subfamily Panicoideae. Basle: Ciba-Geigy, 1980.

Cita MLA (9a ed.)

Häfliger, Ernst, y Hildemar Scholz. Grass Weeds: 1, Weeds of the Subfamily Panicoideae. Ciba-Geigy, 1980.