APA (7th ed.) Citation

King, R. G. S. (1948). S. Columb's Cathedral, Londonderry. Historical Guide 1948. David Irvine.

Chicago Style (17th ed.) Citation

King, Richard George Salmon. S. Columb's Cathedral, Londonderry. Historical Guide 1948. Londonderry: David Irvine, 1948.

MLA (9th ed.) Citation

King, Richard George Salmon. S. Columb's Cathedral, Londonderry. Historical Guide 1948. David Irvine, 1948.

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