It seems like it may be from an "old" book. I did find it at the following website: https://wakandalegendbasenji.com/basenji-in-africa/ The site owner should be able to tell you something about where they found the photo.
Basenji Workout
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The jaw strength! mine gives up if i pull even remotely hard
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Ellie looks like she is enjoying it - as if it’s an amusement park ride!
So cute! 
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awesome!
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Looks like both of you are having fun, but only one of you is going to have to buff out the floor! LOL
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I love finding little things like this that a dog loves to do with a human. Very satisfying.
