APA (7th ed.) Citation

British Library & Welwood, J. Mercurius Britannicus or The Weekly Observator.

Chicago Style (17th ed.) Citation

British Library and James Welwood. Mercurius Britannicus or The Weekly Observator.

MLA (9th ed.) Citation

British Library and James Welwood. Mercurius Britannicus or The Weekly Observator.

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