APA (7th ed.) Citation

Shawyer, Jo, O'Brien,Aloysius, & Aloysius, O. Aloysius's drawing of doulbe mould board plough.

Chicago Style (17th ed.) Citation

Shawyer, Jo, O'Brien,Aloysius, and O'Brien Aloysius. Aloysius's Drawing of Doulbe Mould Board Plough.

MLA (8th ed.) Citation

Shawyer, et al. Aloysius's Drawing of Doulbe Mould Board Plough.

Warning: These citations may not always be 100% accurate.