(1980). The book of time. USA: Westbridge Books.
Παραπομπή Chicago StyleThe Book of Time. USA: Westbridge Books, 1980.
Παραπομπή MLAThe Book of Time. USA: Westbridge Books, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.
(1980). The book of time. USA: Westbridge Books.
Παραπομπή Chicago StyleThe Book of Time. USA: Westbridge Books, 1980.
Παραπομπή MLAThe Book of Time. USA: Westbridge Books, 1980.