APA (7e ed.) Bronvermelding

Ettema, R., & Mutel, C. F. (2014). Hans Albert Einstein: His life as a pioneering engineer. American Society of Civil Engineers.

Chicago (17e ed.) Bronvermelding

Ettema, R., en Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. Reston, Virginia: American Society of Civil Engineers, 2014.

MLA (9e ed.) Bronvermelding

Ettema, R., en Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. American Society of Civil Engineers, 2014.