APA (7th ed.) Citation

Great Britain. (1836). Treaty between His Majesty and the Queen Regent of Spain, during the minority of her daughter Donna Isabella the Second, Queen of Spain, for the abolition of the slave trade, signed at Madrid, June 28, 1835. [publisher not identified].

Chicago Style (17th ed.) Citation

Great Britain. Treaty Between His Majesty and the Queen Regent of Spain, During the Minority of Her Daughter Donna Isabella the Second, Queen of Spain, for the Abolition of the Slave Trade, Signed at Madrid, June 28, 1835. London: [publisher not identified], 1836.

MLA (9th ed.) Citation

Great Britain. Treaty Between His Majesty and the Queen Regent of Spain, During the Minority of Her Daughter Donna Isabella the Second, Queen of Spain, for the Abolition of the Slave Trade, Signed at Madrid, June 28, 1835. [publisher not identified], 1836.

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