Citazione Stile APA (7a Edizione)
Ettema, R., & Mutel, C. F. (2014). Hans Albert Einstein: His life as a pioneering engineer. American Society of Civil Engineers.
Citazione stile Chigago Style (17a edizione)
Ettema, R., e Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. Reston, Virginia: American Society of Civil Engineers, 2014.
Citatione MLA (9a ed.)
Ettema, R., e Cornelia Fleischer Mutel. Hans Albert Einstein: His Life as a Pioneering Engineer. American Society of Civil Engineers, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.