APA Style
Circular Letter. (1999).
Vatican City:
Citta Del Vaticano.
Chicago Style
Circular Letter.
1st.
Vatican City:
Citta Del Vaticano,
1999.
Text.
MLA Style
Circular Letter.
1st.
Vatican City:
Citta Del Vaticano,
1999.
Text.
Turabian Style
Circular Letter.
Vatican City:
Citta Del Vaticano,
1999.
Print.