APA (7th ed.) Citation

DAY. (1968). Day of Peace 1968. Typis polyglottis Vaticanis.

Chicago Style (17th ed.) Citation

DAY. Day of Peace 1968. Citta del Vaticano: Typis polyglottis Vaticanis, 1968.

MLA (9th ed.) Citation

DAY. Day of Peace 1968. Typis polyglottis Vaticanis, 1968.

Warning: These citations may not always be 100% accurate.