Worthington, W. (1989). Early Risers: Escalators came in variety of imperfect forms for several decades before a sensible standard design.
Chicago-Zitierstil (17. Ausg.)Worthington, William. Early Risers: Escalators Came in Variety of Imperfect Forms for Several Decades Before a Sensible Standard Design. 1989.
MLA-Zitierstil (9. Ausg.)Worthington, William. Early Risers: Escalators Came in Variety of Imperfect Forms for Several Decades Before a Sensible Standard Design. 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.