There is an image in a paper that I want to use in my master’s thesis. I have the PDF file of this paper and I cant save the image from the file. So I have to take a screen shot. How should I cite the image?
It is very much possible and easy to extract the image from the PDF document. Please use: http://www.pdfaid.com/ExtractImages.aspx or: https://www.pdf-online.com/osa/extract.aspx or any other tool you can find online by searching for: 'extract images from pdf'.
Please cite the extracted image in APA style (or other applicable style) as follows:
Figure 2. Male holotye of Hypsiboas gladiator (Kholer et al., 2010, p. 584).
Kohler, J., Koscinski, D., Padial, J. M., Chaparro, J. C., Handford, P., Lougheed, S. C., & Riva, I. (2010). Systematics of Andean gladiator frogs of the Hypsiboas pulchellus species groug (Annuar, Hylidae). Zoologica Scripta, 39(6), 572-590. doi:10.111/j.1463-6409.2010.00448.x