APA (7th ed.) Citation

Ruskin, J. (1912). A popular handbook to the national gallery. Macmillan.

Chicago Style (17th ed.) Citation

Ruskin, John. A Popular Handbook to the National Gallery. Londres: Macmillan, 1912.

MLA (9th ed.) Citation

Ruskin, John. A Popular Handbook to the National Gallery. Macmillan, 1912.