Dillenburg, D. (2004). But that was then, and this is now. Sociedade Brasileira de Física.
Chicago-Zitierstil (17. Ausg.)Dillenburg, Darcy. But That Was Then, and This Is Now. Sociedade Brasileira de Física, 2004.
MLA-Zitierstil (9. Ausg.)Dillenburg, Darcy. But That Was Then, and This Is Now. Sociedade Brasileira de Física, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.