APA (7th ed.) Citation

Proctor, R. A. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction.

Chicago Style (17th ed.) Citation

Proctor, Richard A. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction.

MLA (9th ed.) Citation

Proctor, Richard A. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction.

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