(1970). Kalendaryong pangkasaysayan. [s.n.].
Chicago Style (17th ed.) CitationKalendaryong Pangkasaysayan. Maynila: [s.n.], 1970.
ציטוט MLAKalendaryong Pangkasaysayan. [s.n.], 1970.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.
(1970). Kalendaryong pangkasaysayan. [s.n.].
Chicago Style (17th ed.) CitationKalendaryong Pangkasaysayan. Maynila: [s.n.], 1970.
ציטוט MLAKalendaryong Pangkasaysayan. [s.n.], 1970.