Ok. We understand... But We do not know why we need to cite the images since we are using images under CC0 Creative Commons license which is said to be Free for commercial use and No attribution required ? You can check the licenses here: https://pixabay.com/en/race-car-logo-symbol-speed-coupe-309123/ and here: https://pixabay.com/en/rocket-space-ship-space-launch-312767/. The first image (the one next the first paragraph was developed by ourselves using other images which licenses permits: "Sharing, copying and redistributing in any medium or format including adapting, remixing, transforming, and building upon the material for any purpose, even commercially"... Anyway We will cite them in the article as a good practice, as we have not read your rules before using your post promoting service. Best regards, @brupvoter Team.