Breithaupt, J. (2000). Teach yourself 101 key ideas: Stronomy. Teach Yourself.
Citazione stile Chigago Style (17a edizione)Breithaupt, Jim. Teach Yourself 101 Key Ideas: Stronomy. London: Teach Yourself, 2000.
Citatione MLA (9a ed.)Breithaupt, Jim. Teach Yourself 101 Key Ideas: Stronomy. Teach Yourself, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.