Friedrich, J. (2002). 4 1/2 philoi kai to ainigma sto spiti tu epistatē (1. ekdosē.). Empeiria Ekdotikē.
Chicago Style (17th ed.) CitationFriedrich, Joachim. 4 1/2 Philoi Kai to Ainigma Sto Spiti Tu Epistatē. 1. ekdosē. Athēna: Empeiria Ekdotikē, 2002.
MLA (9th ed.) CitationFriedrich, Joachim. 4 1/2 Philoi Kai to Ainigma Sto Spiti Tu Epistatē. 1. ekdosē. Empeiria Ekdotikē, 2002.
Warning: These citations may not always be 100% accurate.