Παραπομπή APA

BALLARD,Ernesta Drinker. (1962). THE ART OF TRAINING PLANTS. HARPER & BROTHERS.

Παραπομπή Chicago Style

BALLARD,Ernesta Drinker. THE ART OF TRAINING PLANTS. NEW YORK: HARPER & BROTHERS, 1962.

Παραπομπή MLA

BALLARD,Ernesta Drinker. THE ART OF TRAINING PLANTS. HARPER & BROTHERS, 1962.